We found a bug internally where gdb would crash while disassembling a
certain instruction. This was tracked down to the handling of %I64d
in format_pieces.
format_pieces will convert %ll to %I64d on mingw -- so format_pieces
should also handle parsing this format. In this patch, I've made the
parsing unconditional, since I think it is harmless to accept extra
formats. I've also taken the opportunity to convert the length
modifier test to a "switch".
Tested internally using our failing test case.
gdb/ChangeLog
2019-11-21 Tom Tromey <tromey@adacore.com>
* gdbsupport/format.c (format_pieces): Parse %I64d.
* unittests/format_pieces-selftests.c (test_windows_formats): New
function.
(run_tests): Call it.
Change-Id: If335c7c2fc8d01e629cd55182394a483334d79c7
The gdb format mechanism doesn't currently support the 'z' size
modifier, there are a few places in GDB where this is used. Instead
of removing these uses lets just add support to GDB for using 'z'.
I found this issue when trying to use some of the debug output.
Before this commit:
(gdb) set debug dwarf-line 9
(gdb) file test
Reading symbols from test...
Unrecognized format specifier 'z' in printf
(No debugging symbols found in test)
(gdb)
After this commit:
(gdb) set debug dwarf-line 9
(gdb) file test
Reading symbols from test...
Adding dir 1: /usr/include
Adding file 1: test.c
Adding file 2: stdc-predef.h
Processing actual line 3: file 1, address 0x4004a0, is_stmt 1, discrim 0
Processing actual line 4: file 1, address 0x4004a0, is_stmt 1, discrim 0
.... lots of debug output ...
Processing actual line 10: file 1, address 0x4003b7, is_stmt 0, discrim 0
(gdb)
I've added a self test to cover the integer format size modifiers,
including the 'z' modifier.
gdb/ChangeLog:
* gdbsupport/format.c (format_pieces::format_pieces): Support
printf 'z' size modifier.
* gdbsupport/format.h (enum argclass): Add size_t_arg.
* printcmd.c (ui_printf): Handle size_t_arg.
* ui-out.c (ui_out::vmessage): Likewise.
* unittests/format_pieces-selftests.c (test_format_int_sizes): New
function.
(run_tests): Call test_format_int_sizes.
gdb/gdbserver/ChangeLog:
* ax.c (ax_printf): Handle size_t_arg.
Change-Id: Ib6c44d88aa5bce265d757e4c0698881803dd186f
This introduces a few gdb-specific %p format suffixes. This is useful
for emitting gdb-specific output in an ergonomic way. It also yields
code that is more i18n-friendly.
The comment before ui_out::message explains the details.
Note that the tests had to change a little. When using one of the gdb
printf functions with styling, there can be spurious style changes
emitted to the output. This did not seem worthwhile to fix, as the
low-level output functions are rather spaghetti-ish already, and I
didn't want to make them even worse.
This change also necessitated adding support for "*" as precision and
width in format_pieces. These are used in various spots in gdb, and
it seemed better to me to implement them than to remove the uses.
gdb/ChangeLog
2019-10-01 Pedro Alves <palves@redhat.com>
Tom Tromey <tom@tromey.com>
* unittests/format_pieces-selftests.c: Add gdb_format parameter.
(test_gdb_formats): New function.
(run_tests): Call it.
(test_format_specifier): Update.
* utils.h (fputs_filtered): Update comment.
(vfprintf_styled, vfprintf_styled_no_gdbfmt)
(fputs_styled_unfiltered): Declare.
* utils.c (fputs_styled_unfiltered): New function.
(vfprintf_maybe_filtered): Add gdbfmt parameter.
(vfprintf_filtered): Update.
(vfprintf_unfiltered, vprintf_filtered): Update.
(vfprintf_styled, vfprintf_styled_no_gdbfmt): New functions.
* ui-out.h (enum ui_out_flag) <unfiltered_output,
disallow_ui_out_field>: New constants.
(enum class field_kind): New.
(struct base_field_s, struct signed_field_s): New.
(signed_field): New function.
(struct string_field_s): New.
(string_field): New function.
(struct styled_string_s): New.
(styled_string): New function.
(class ui_out) <message>: Add comment.
<vmessage, call_do_message>: New methods.
<do_message>: Add style parameter.
* ui-out.c (ui_out::call_do_message, ui_out::vmessage): New
methods.
(ui_out::message): Rewrite.
* mi/mi-out.h (class mi_ui_out) <do_message>: Add style
parameter.
* mi/mi-out.c (mi_ui_out::do_message): Add style parameter.
* gdbsupport/format.h (class format_pieces) <format_pieces>: Add
gdb_extensions parameter.
(class format_piece): Add parameter to constructor.
(n_int_args): New field.
* gdbsupport/format.c (format_pieces::format_pieces): Add
gdb_extensions parameter. Handle '*'.
* cli-out.h (class cli_ui_out) <do_message>: Add style parameter.
* cli-out.c (cli_ui_out::do_message): Add style parameter. Call
vfprintf_styled_no_gdbfmt.
(cli_ui_out::do_field_string, cli_ui_out::do_spaces)
(cli_ui_out::do_text, cli_ui_out::field_separator): Allow
unfiltered output.
* ui-style.h (struct ui_file_style) <ptr>: New method.
gdb/testsuite/ChangeLog
2019-10-01 Tom Tromey <tom@tromey.com>
* gdb.base/style.exp: Update tests.
I noticed that format_pieces can create an empty literal piece.
However, there's never a need for one, so this patch removes the
possibility.
gdb/ChangeLog
2019-10-01 Tom Tromey <tom@tromey.com>
* unittests/format_pieces-selftests.c: Update. Add final format.
* gdbsupport/format.c (format_pieces::format_pieces): Don't add
empty literal pieces.
This commit applies all changes made after running the gdb/copyright.py
script.
Note that one file was flagged by the script, due to an invalid
copyright header
(gdb/unittests/basic_string_view/element_access/char/empty.cc).
As the file was copied from GCC's libstdc++-v3 testsuite, this commit
leaves this file untouched for the time being; a patch to fix the header
was sent to gcc-patches first.
gdb/ChangeLog:
Update copyright year range in all GDB files.
Silence this:
unittests/format_pieces-selftests.c:51: warning: code: Do not use printf("%ll"), instead use printf("%s",phex()) to dump a `long long' value
unittests/format_pieces-selftests.c:56: warning: code: Do not use printf("%ll"), instead use printf("%s",phex()) to dump a `long long' value
gdb/ChangeLog:
* unittests/format_pieces-selftests.c (test_format_specifier):
Add ARI comments.
I noticed that the printf command did not recognize the \e escape
sequence, used amongst other things to use colors:
(gdb) printf "This is \e[32mgreen\e[m!\n"
Unrecognized escape character \e in format string.
This patch makes format_pieces recognize it, which makes that command
print the expected result in glorious color.
I wrote a really simple unit test for format_pieces.
format_pieces::operator[] is unused so I removed it. I added
format_piece::operator==, which is needed to compare vectors of
format_piece.
gdb/ChangeLog:
PR cli/14975
* Makefile.in (SUBDIR_UNITTESTS_SRCS): Add
unittests/format_pieces-selftests.c.
* common/format.h (format_piece) <operator==>: New.
(format_pieces) <operator[]>: Remove.
* common/format.c (format_pieces::format_pieces): Handle \e.
* unittests/format_pieces-selftests.c: New.
